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Problem
Problem
The function
f
(
x
)
=
4
x
−
1
−
9
x
+
1
f(x) = \frac{4}{x-1} - \frac{9}{x+1}
f
(
x
)
=
x
−
1
4
−
x
+
1
9
will a. have absolute maximum value
−
1
2
-\frac{1}{2}
−
2
1
b. have absolute minimum value
−
25
2
-\frac{25}{2}
−
2
25
c. not lie between
−
25
2
-\frac{25}{2}
−
2
25
and
−
1
2
-\frac{1}{2}
−
2
1
d. always be negative
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